Telescoping ventilator



Nov. 19, 1968 A. A. GRAHAM ET AL 3,411,427

TELESGOPING VENTILATOR Filed July 11, 1966 g 2 Sheets-Sheet 1 Inventors 4; 5m Mose Apr/Me G'A'fl/MM ALLA?" Amaze-raw A ltorneys NOV. 19, 1968 G AH ET AL 3,411,427

TELESCOP ING VENTILATOR Filed July 11, 1966 2 Sheets-Sheet 2 Inventors Attorneys United States Patent 3,411,427 TELESCOPING VENTILATOR Alexander A. Graham and Allan Anderson, both of 4 Brymner St., Greenock, Scotland Filed July 11, 1966, Ser. No. 564,159

7 Claims. (Cl. 98-64) ABSTRACT OF THE DISCLOSURE A ventilator comprises a tubular air-intake member which telescopes with a tubular coaming-The intake member may be'held in extended position relative to the coaming by means of interengaging rings that are recessed to interfit, after which the intake member is turned relative to the coaming to lock itself in extended position. Special wind scoops are provided, as well as releasable locks for maintaining the intake member in collapsed position.

This invention relates to ventilators, especially ventilators for use in ventilating ships holes.

The present invention is a ventilator comprising a tubular coaming, an air-intake member mounted in telescopic relationship with the coaming between extended and retracted positions and having an air opening therein; and co-operating guide members on the coaming and air intake member whereby the coaming and air intake member are telescopic only in particular relative positions and whereby the air intake member is maintained in the extended position.

Preferably, the air opening extends over half the circumference of the air intake member.

Preferably also, windscoops are mounted adjacent to the opening. Said wind scoops may be formed by hinged flaps which are-closable over the exhaust opening.

Said means for maintaining the air-intake member in the extended position may include first and second rings on the coaming and air-intake member respectively, said rings being slotted to permit said member to be moved from a collapsed position to the extended position.

Preferably also, one ring is a channel section collar having'a first series of slots in one flange and a second similar-jseries of slots in the other flange but out of alignment with said first series of slots, the other ring being slotted similarly to the flanges for rotatable alignment with each slot in turn.

Preferably also, the means to retain the air-intake member in the collapsed position is a quick-release lock comprising a slotted head piece secured to the movable member, a foot piece secured to a stationary member and pivotally mounting a slotted fulcrum lever, a U bar located in the slot of the fulcrum lever and mounting a bridge piece over the open end, and a pin mounted on the bridge piece for engagement in the head piece.

Embodiments of the invention will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a sectional elevation of a ventilator according to one embodiment of the present invention, located in the extended position;

FIG. 2 is an elevation of the ventilator shown in FIG. 1, located in the collapsed position, showing modified securing means;

FIG. 3 is a perspective view of the securing means shown in FIG. 2;

3,411,427 Patented Nov. 19, 1968 "Ice FIG. 4 is a sectional elevation of a ventilator according to a second embodiment of the present invention located in the extended position;

FIG. 5 is a plan of FIG. 4; and

FIG. 6 is an elevation of a ventilator according to a third embodiment.

Referring firstly to FIG. 1 of the drawings, a ship's ventilator consists of a tubular coaming 10 inside which is located an air-intake member 11 which is telescopically movable from a collapsed or retracted position (FIG. 2) to a raised or extended position, FIG. 1.

The coaming 10 is provided with an external flange by means of which the coaming may be secured by welding or bolting to the upper surface of a hatch cover 12. The coaming is dimensioned to project through the hatch cover.

The air-intake member 11 which is also tubular has an easily sliding fit in the coaming 10. The upper part of the air-intake member is provided with an opening 13 extending over half the circumference of the member. A wire mesh (not shown) normally covers this opening. On the top of the air-intake member 11 a cover 14 is secured which is provided with an external lip 15. When the ventilator is in the collapsed position (FIG. 2) this lip engages the annular upper surface of the coaming. A neoprene or similar gasket 16 in the lip, together with securing means, such as bolts 17, between the coaming 10 and the cover 14 render the ventilator watertight in the collapsed position.

To support the air-intake member in the extended position two partially broken or slotted rings 18, 19, are provided, one (18) secured to the internal surface of the coaming 10 and the other (19) secured to the external surface of the inner member 11. The slots or gaps 22 in each ring are complementary with the unbroken portions of the other ring and the slots are irregularly spaced so that there is only one angular position at which the rings will pass through each other, i.e. at which the ventilator may be extended or collapsed. In all other positions the rings foul each other so that the member 11 may be supported in the extended position. Removably secured to the inside of the coaming above the first ring is a third ring 20 to prevent accidental removal of the member from the coaming. Moreover at the bottom of the member 11 are provided three centering pieces 21 which engage the coaming to centre the air-intake member correctly. The centering pieces 21 are located so as to be capable of clearing the unbroken portion of the first ring. Markers, such as arrow (not shown) on the top of the air-intake member 11 and an arrow (not shown) on the side of the coaming 10 are provided to indicate (by aligning the arrows) the relative positions of the member 11 and coaming 10 at which the member 11 can be extended or collapsed.

A third arrow (not shown) may also be provided to indicate the relative positions of the ventilator and hatch cover at which the ventilator can be removed, for example, when it is desired to load grain or the like down the ventilator shaft.

In use the ventilator is mounted in the raised position of FIG. 1 and the air-intake member .11 turned in accordance with the prevailing wind to provide maximum ventilation. If necessary, the ventilator may be quickly collapsed by turning the air-intake member to the collapsing position FIG. 2 and then rendered watertight by manipulation of the securing means. In the collapsed position, the ventilator extends only a foot or two above the hatch cover and is, therefore, unlikely to be damaged in rough weather, and when the hatch covers are in the stowed position this coaming must be of a height not more than the depth of the adjoining hatch where it is sited when the hatches are stowed.

In a modification, as shown in FIG. 2, the securing bolts are replaced by quick-release locks each of which includes a head piece 40 secured to the movable air-intake member 11 and a foot piece 41 secured to the coaming l2 vertically below the head piece.

The head piece 40 is D-shaped in plan and has a longitudinal slot 42 extending from the rounded end to sub- ;tantially midway along the head piece. The lower part of the slot is U-shaped in plan, but the upper part is formed into a circular wall 43, and a ledge separates the lower part of the slot from the upper expanded part. A bolt, or similar object, can be located and held in the slot Where the stem engages the lower part of the slot and the bolt head resting on the ledge lies within the ipper expanded part of the slot.

The foot piece 41 carries a slotted fulcrum lever 45 which is pivotal thereon and a U-bar 46 is located in the slot 47 of the fulcrum lever. The U-bar 46 mounts a ridge piece 48 over its open (upper) end and a threaded aperture is located centrally in the bridge piece 48 to re- :eive a bolt 49, the head of which is located outside, i.e. above the U bar. The bolt is for engagement with the slot 12 and the chamber above it. In use, assuming the lock be secured, the fulcrum lever 45 is raised by a handle nounted thereon, thus causing the lever to pivot about he foot piece 41. This upward movement raises the J-bar 46 and consequently the bolt 49 the head of which ises clear of the head piece 40. The bolt then topples away from the head piece and the lock is thus released. F0 secure the lock, the bolt is held in the vertical posiion and the fulcrum lever pivoted downwards to draw he bolt head into the upper part of the chamber in the piece 40.

The bolt may be adjustable so that the length from the )olt head to the bridge piece can be varied to give a ighter or slacker lock.

A second embodiment (FIGS. 4 and 5) illustrates a Ientilator which is formed similarly to that hereinbefore lescribed in the first embodiment and like parts are desig- 1ated by like numerals.

In the second embodiment however, the rings 18 to 20 are replaced by a channel section collar 50, and a pad 51. [he collar 50 has flanges 18A, 20A, facing outward and s welded to the outer face of the airintake member 11. [he pad 51 is welded to the inner face of the coaming 1nd is a ring with three slots or gaps 54 therein.

The upper flange 18A is slotted complementary to the :ad 51 so that when the pad and flange are rotatably aligned the pad can drop through the flange 18A into lange 20A. The air-intake member is then in the extended aosition, supported thereon by the pad 51 resting on flange 50A.

The lower flange 20A is slotted in the same manner IS flange 18A but the slots of flange 20A are out of alignnent with those of flange 18A. Thus, the member 11 is :ollapsed by rotatably aligning the slots of pad 51 with hose of flange 20A.

A further modification to the ventilators shown in IGS. 1 and 2 is that the opening 13 is closable by flaps i0 which are vertically hinged at the edges of the opening ll'ld which, in the fully open position, form wind scoops. [he vertical walls of the flaps 30 are formed by verically halving the piece of metal which was cut from the nner tubular member 11 to provide the opening 13. The laps also have upper and lower horizontal walls 31 of ubstantially triangular shape. Each flap 30 is pivotally mounted at one corner to the inner member 11.

When the flaps 30 are closed as shown by dotted lines n FIG. 5 the edges of their upper and lower walls abut as do the two vertical walls. A lock is provided to releasably retain the flaps 30 closed and consists of a fiat bar slip bolt 32 mounted on the inner vertical face of one flap and a keeper 33 mounted on the other.

Vertical bars 34 are provided at the other corner of each flap 30. When the flaps are fully open, the bars 34 are located at the front of the opening and substantially centrally. A vertical stanchion 35 is mounted centrally across the front of the opening and the bars 34 carry rods 36 for attachment to cleats (not shown) on the stanchion 35 thereby to releasably retain the flaps in the open position.

When the flaps 30 are closed the bars are located close together towards the rear wall of the inner member 11 as indicated by numerals 34' in FIG. 5.

The flaps according to the second embodiment are advantageous in that they are easily adjustable between the open and closed positions. Also, in the latter position, they act as wind scoops, the vertical surface presented to the wind being concave in order to direct the air stream into the opening. Thus, the wind scoop increase the efficiency of the ventilator according to the invention. In the closed position, the flaps blend with the contour of the inner member and do not interfere with the telescopic movement thereof. 1

In a further embodiment (FIG. 6) the tubular memberis telescopically mounted outside the coaming. In this construction the Wind scoops are permanently secured in the open position, as they do not interfere with erection or collapsing of the air-intake member. The ventilator is shown incorporating the channel collar 50, on the member 11, the pad 51 on the coaming 10 and the quick-release locks, the foot piece of the latter being mounted on a deck ring 53 located around the coaming.

It is considered that location of the tubular member outside the coaming will prevent the possibility of rain water trickling down into the hold between the surfaces of the member and coaming.

We claim:

1. A ventilator comprising a tubular coaming, a tubular air-intake member mounted in telescopic relationship with the coaming for rectilinear movement relative to the coaming between extended and retracted positions and having an air opening therein; coopenating guide member means on the coaming and air-intake member, said guide member means on one of said coaming and airintake member having gaps through which said guide member means on the other of said coaming and airintake member pass in particular relative positions of said coaming and air-intake member whereby the coaming and air-intake member are telescopic only in said particular relative positions and whereby the air-intake member is maintained in the extended position by rotation of the air-intake member relative to the coaming to effect engagement of the guide member means with each other in positions other than said particular relative positions.

2. A ventilator as claimed in claim 1 in which the air opening extends over half the circumference of the airintake member.

3. A ventilator as claimed in claim 1, in which the said guide members for maintaining the air-intake member in an extended position include first and second rings on the coaming and air-intake member respectively, said rings being slotted to permit the members to be moved telescopically between the collapsed position and theextended position.

4. A ventilator as claimed in claim 3, in which-one ring is a channel section collar having a first series of slots in one flange and a second similar series of slots in the other flange but out of alignment with said first series of slots, the other ring being slotted similarly to flanges for rotatable alignment with each slot in turn.

5. A ventilator as claimed in claim 1, and means to retain the air-intake member in the collapsed position comprising a quick-release lock comprising a slotted head piece secured to the movable member, a foot piece secured to a stationary member and pivotally mounting a slotted fulcrum lever, a U-bar located in the slot of the fulcrum lever and mounting a bridge piece over the open end, and a pin mounted on the bridge piece for engagement in the head piece.

6. A ventilator as claimed in claim 1, and wind scoops mounted adjacent to the air opening, said Wind scoops being formed by parts of the wall of the tubular air-intake member.

7. A ventilator as claimed in claim 6, in which the wind scoops are hinged on the tubular air-intake member and are closable to completely close the air opening.

References Cited UNITED STATES PATENTS Porter 98118 Ahern 9864 Nelson 114211 Loy 9864 Dahlin 9864 XR Lipton 9864 10 ROBERT A. OLEARY, Primary Examiner.

M. A. ANTONAKAS, Assistant Examiner. 

